Haier HC18D1VAR Service Manual page 31

furnace
Condenser fan and
compressor don't run
Condenser fan runs,
compressor doesn't
Compressor runs,
Condenser fan
doesn't
Register sweat
High head – Low
vapor pressures
High head – High or
normal vapor
pressures
Low head – High
vapor pressures
Low vapor – cool
compressor – iced
evaporator coil
High vapor pressure
Fluctuating head and
vapor pressures
Pulsing noise at
metering device or
liquid line
31
Central Air Conditioner
trap
AC Contact not connected to the
power supply wire or not tightly fasten tightly fasten.
The outdoor power supply main circuit
switch in "OFF" position or fuse
blown on main circuit
The control coil of AC Contactor no 24
V AC power
Run or start capacitor defective
Loose connection
Compressor stuck, grounded or open
motor winding, open internal overload
Low voltage condition
Low voltage condition
Run capacitor defective
Loose connection
Fan stuck, grounded or open motor
winding, open internal overload
Low voltage condition
Defective overload protector
Refrigerant undercharge
Low evaporator airflow
Restriction in liquid line, metering
device or filter drier
Flowrator piston size too small
Incorrect capillary tubes
Blocked outdoor coil
Refrigerant overcharge
Condenser fan not running
Air, non-condensibles or moisture in
system
Flowcheck piston size too large
Defective compressor valves
Incorrect capillary tubes
Low evaporator airflow
Operating below 65 F outdoors
Moisture in the system
Excessive load
Defective compressor
Air or non-condensibles in system
Air or non-condensibles in system
Model: Cooling Only, 13SEER units
operation of condensate pump.
Re-connect the power supply wire, and
Reset the power supply switch to " ON"
position or change the fuse and confirm the
main power lead to the
has voltage present.
Check if the relay P2 of 3-minute timer board
have current output ,if not ,check if P1
have 24 V AC input
please check if it keep for 3 minutes
and P2 no output change the 3-minute
timer board if keep time < 3 minutes
no output ; if P1 P3 no24V AC
check the thermostat C
24 V AC if no 24 V AC then check the
thermostat or reset the setting temp.; if have
24 V AC ,check if the C Y and P1
connection wire cut off or fasten loosely if
cut off then change the parts.
Replace
Check and tighten all connections.
Wait for 2 hours for overload to reset.
Replace compressor if still open.
At compressor terminals, voltage must be
within 10% of rating plate volts when unit is
running.
Add start kit components
Replace
Check and tighten all connections.
Wait for 2 hours for overload to reset.
Replace Fan if still open.
At compressor terminals, voltage must be
within 10% of rating plate volts when unit is
running.
Replace – check for correct voltage
Add refrigerant
Increase blower speed or reduce restriction
– replace air filter
Replace defective components
Change to correct size piston
Change coil assembly
Clear away leaves and other debris
Correct system charge
Repair or replace
Recover refrigerant, evacuate & recharge,
add filter drier
Change to correct size piston
Replace compressor
Replace coil assembly
Increase blower speed or reduce restriction
– replace air filter
Add low ambient kit
Recover refrigerant, evacuate & recharge,
add filter drier
Recheck load calculation
Replace
Recover refrigerant, evacuate & recharge.
Recover refrigerant, evacuate & recharge
Contactor
P3
if have 24V AC
if so
P2
first
Y terminal have
P3